﻿// 1.1.1.10. Write a program that prints the first 100 members of the sequence: 2, -3, 4, -5, 6, -7, ...

using System;

class Sequence
{
    static void Main()
    {
        for (int i = 2; i < 103; i++)
        {
            if (i % 2 == 0)
            {
                if (i != 102)
                {
                    Console.Write(i + ", ");
                }
                else
                {
                    Console.WriteLine(i);
                }
            }
            else
            {
                Console.Write("-" + i + ", ");
            }
        }
    }
}
